Pulverizing-machine.



No. 648,488. Patented May' I, I900.

a. s. EMERICK.

PULVEBIZING MACHINE.

(Applicatibn filed Aug. 8, 1898.) (No Model.) -2 Sheets-Sheet I.

g mma Q A TTOHNEY. Y

No. 648,488. Patented May I, I900.

' G. S. EMERICK.

FULVEBIZING MACHINE.

(Application filed Aug. 6, 1898.) (No Model.) 2 Sheats-$heet z ......JIIIIM ,Jr JV WITNESSES i //v vnvrcn 7 NITED STATES PATENT OFFICE.

Y PULVERlZlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 648,488, dated May 1, 1900.

.Afplichtion filed August 6, 1898- gefial 1 (N0 modem To all whom it may concern:

Be it known that I, GEORGE S. EMERICK, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented anew and usefulPulverizing-Machine, of which the following is a specification.

My invention relates to improvements in pulverizing-machines in which balls driven by rotating arms traversing within a cylindrical casing operateto grind or comminute the substances desired; and one object of my improvement is to impart greater strength and efficiency to such machines by combining the driving-arm and feed-conduit in such manner that the material to be pulverized is fed directly against the face of the grindingring without passing around the balls or into the ball-sockets.

A further object of myimprovement is to do away with the wear upon the face of the driv ing-arm at its point of contact with the ball, and, lastly, to obviate the strain upon the upper portion of the cylindrical casing due to the expansion of the grinding-ring when heated by the operation of grinding or pulverizing.

I attain these objects by the mechanism illustrated in the accompanying drawings, in whicht Figure l is a vertical section of the entire machine upon the'line 1 1, Fig. 3; Fig. 2, a view in side elevation of the entire machine; Fig. 3, ahorizontal section or plan of the machine on the line 3 3, Fig. 1, the upper plate or cap of the cylindrical casin g being removed;

Fig. 4, a view in sideelevation of the combined driving-arm and feed-conduit with the scrapers and with the ball in place.

In Fig. 1 the casing A A, with its supports B B, constitutes the framework of the machine. The lower supporting portion of the frame is provided with an annular beveled face adapted to receive a grinding-ring, and the upper covering portion of the frame is also provided with an annular beveled face to engage such a ring. These frame portions are provided with aperturesthrough which bolts, as L L, are passed, springs M M being interposed between the nuts on the upper ends of the said bolts and the top of the upper frame portion, as clearly seen in Figs. 1 and 2 of the drawlngs.

This holds the frame portions together with a yieldingpressure and enables them to give when the parts (more particularly the grinding-ring) become heated. The grindingring J forms an important feature of my in vention, and is provided with an inner concaved grinding-face and outer annular beveled faces which are adapted to coincide with and bear upon the annular beveled faces of the upper and lower frame portions. It will be seen from the drawings, especially Fig. 1, that the grinding-ring J wedges the upper and lower frame portions apart, thus forming the sidewalls of the grinding-chamber of the machine. The action of the spring carrying bolts L L therefore has a tendency to so draw the frame portions together as to properly center the grinding-ring between them.

0 is a shaft with a partly-hollow portion 0 with hearing boxes or collars D D, support= ed by and revolving upon the pintle E.

F is a pulley-wheel attached to and revolving the shaft 0. The shaft C is provided about centrally of its length with a horizontally-arranged disk or cylindrical portion which is provided with a series of recesses or sockets to receive the grinding-balls I I. The bottoms of the said sockets are closed by suitable ball-supporting floors which carry the balls around in the operation of the device.

. G G are driving-arms, of which there may be any number from two upward, each containing the feed-conduit H, which opens into the hollow portion 0 of the shaft 0. v

In setting forth the operative portion'of the machine, as shown in Fig. 1, it should be borne in mind that-the right-hand half of the vertical section there shown passes through the driving-arm on a line running through the centerof the feed-conduit H, while the left-hand half passes through the axis of the most nearly opposite socket between two of the driving-arms, as shown by the line 1 1,

Fig. 3.

I is a ball in place in the socket between the driving-arms.

K is a hopper with its pipe communicating with the hollow portion 0 of the shaft 0.

N N are scrapers attached radially to the bottoms of the driving-arms G G.

S S are rubber rings between the outer faces of the grinding-ring and the upper and lower portions of the cylindrical casing.

ICO

In Fig. 3, O O are what I term driving- 1 blocks, inserted inthe face of each drivingarm. PP are channels passin g through each when orn.

driving-arm back of the driving-blocks to facilitate theremoval The operation of the pulverizing-machine is as follows: The shaft being driven with.

. into the mouth of the hollow shaft andis thence drawn or driven by centrifugalor other great velocity by any suitable means, the ma terial to be pulverized is fed from the hopper force through the'fced-conduits H H, Fig. 3,

rangement of the feed-conduits is such that the material is fed in back of the balls, or, in

other words, where it is fed either into the socket carrying the ball or into the space between the driving-arms where the ball is being driven, the socket or space is liable to become temporarily choked or obstructechand the grinding is in some measure donebetween the ball and its surrounding socket instead of taking place between the face of the grinding-ring and the ball, as it should do. This develops great heat and unnecessary friction,

with a consequent rapid wear of parts and an imperfectly and unevenly ground product. By the form andarrangement of the feedconduits herein shown and described the material is fed directlyto the concave face of the grinding-ring, where it is pulverized by the ball without coming in contact with the ball at the point at which it is being driven and without being obliged to pass around the ball or through the ball socket or chamber in order to reach the grinding-ring. I I, Fig. 3, driven by the driving-arms in the direction indicated by the arrow, are thrown outward against the concave face of the grinding-ring and operate to crush the material'in the course of their rotation. As the crushed product falls to the bottom of the casing it is carried by the scrapers N N, Fig. 1, to the outlet Q, through which it passes The number of balls and driving-arms with their feed-conduits is immaterial, depending upon the size of the pulverizer and the character of the material to be pulverized. Cylinders or cones might also be used instead of of the drivingblocks" The balls eases or, in other words, rigidlyconnected, the expansion of the grinding-ring, due to'theheat developed in the process of grinding, forces up the upper part of the casing and breaks loose any such rigid connecting means. To

obviate this difficulty, the bolts or rods L L,

Figs. 1 and 2, are fur'nishedwith the springs M M, which allow the upper part of the easing to yield to the pressure of the expanding grinding-ring, while at thesainetime holding "the. latter firmly in place.

facesof the grinding-ring and the inclosing v The rubber rings -SS;'Fig. 1, are interposed between the outer casing totake up the jar and lessen the crys- "tallization of the adjacent parts caused by the vibration. U

'To take the wear of the driving-arn at the point of contact with the ball, the drivingblock 0' above described is inserted in the in the driving-arms, striking the inner face ofthegrinding-ring J, Fig. 1. .Wh'ere the ar- 1 driving-arm, as shown in Figs. 3 and 4. The channel P enables the driving-block to be drifted out or removed when worn by the insertion of a wedge or suitable tool. The driving-blocks maybe of any suitable shape,either in the form of a truncated ooneor as herein shown. 1

The step-plate T, Fig. 1, has a relativelyfree vertical movement in the bearing D',moving in downwardly-extending flanges formed thereon. 'The step-plate is secured to the hearing by a suitablenumber of bolts, as

shown at U. These bolts are furnished with springs, as shown at V. This arrangement gives the shaft 0, with its driving-arms, a limited vertical play, and thus allows the driving-arms and balls to automatically adjust themselves to the center of the grinding-ring. By this means the balls bear uniformly against the concave face of the grinding-ring,and thus avoid the heating, wear, and friction due to the balls bearing unequally against either the top or'bottom of the inner face of the ring.

What I claim as my invention, and desire to secure by Letters Patent, is

A pulverizing-machine, comprising a lower supporting-frame, a grinding-ring mounted thereon, an upper frame resting on said grind- Witnesses:

FRANCIS O. ELY, yH. Bovnn SoHEnMERHoRN.

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